In this work,we study environment-assisted excitation energy transfer(EET) through calculating energy transfer efficiency(ETE) in LH1-RC-type and LH2-type trimers,which can be used to mimic energy transfer behaviors i...In this work,we study environment-assisted excitation energy transfer(EET) through calculating energy transfer efficiency(ETE) in LH1-RC-type and LH2-type trimers,which can be used to mimic energy transfer behaviors in the basic unit cells of LH1-RC and LH2 light-harvesting complexes.Quantum state evolution of the trimers is described by a non-Hermitian quantum master equation.ETE in these trimer systems is investigated by the use of numerical solutions at finite temperatures for the non-Hermitian master equation.We theoretically reveal the temperature-assisted ETE enhancement.It is found that highly efficient EET with nearly unit efficiency may occur in the nearby regime of the critical point of quantum phase transition.展开更多
性早熟是指在8岁前的女孩、9岁或9．5岁前的男孩呈现出第二性征的病变。近年来，随着食物添加剂等各种污染出现，在日常生活中，儿童性早熟的发病率明显增高（达0．6％），多出现在女孩，男女比例为1／23～1／3。本病对患儿的危害明显...性早熟是指在8岁前的女孩、9岁或9．5岁前的男孩呈现出第二性征的病变。近年来，随着食物添加剂等各种污染出现，在日常生活中，儿童性早熟的发病率明显增高（达0．6％），多出现在女孩，男女比例为1／23～1／3。本病对患儿的危害明显，青春期提前出现，最终身高低于按正常青春发育的同龄儿童。目前临床上一般通过病史、体检和骨龄、盆腔B超等辅助检查，内分泌检查作出初步诊断，其中黄体生成素释放激素（LHRH）刺激试验检查在真、假性早熟的鉴别诊断中有重要意义。血清瘦素（1eptin）、胰岛素样生长因子（insulin-1ike growth factor，IGF-1）、胰岛素样生长因子结合蛋白-3（IGF-binding protein 3，IGFBP3）水平的升高表示特发性中枢性性早熟（Idiopathic central precociouspuberty，ICPP）患儿下丘脑-垂体-性腺轴（hypothalamic pituitary gonadal，HPG轴）真性启动，因此，血清IGF-1、IGFBP3和leptin与儿童性早熟关系的研究对诊断具有重要意义。展开更多
基金supported by the National Fundamental Research Program (Grant No. 2007CB925204)the National Natural Science Foundation of China (Grant Nos. 11075050 and 10775048)+1 种基金the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT0964)the Hunan Provincial Natural Science Foundation (Grant No. 11JJ7001)
文摘In this work,we study environment-assisted excitation energy transfer(EET) through calculating energy transfer efficiency(ETE) in LH1-RC-type and LH2-type trimers,which can be used to mimic energy transfer behaviors in the basic unit cells of LH1-RC and LH2 light-harvesting complexes.Quantum state evolution of the trimers is described by a non-Hermitian quantum master equation.ETE in these trimer systems is investigated by the use of numerical solutions at finite temperatures for the non-Hermitian master equation.We theoretically reveal the temperature-assisted ETE enhancement.It is found that highly efficient EET with nearly unit efficiency may occur in the nearby regime of the critical point of quantum phase transition.
文摘性早熟是指在8岁前的女孩、9岁或9．5岁前的男孩呈现出第二性征的病变。近年来，随着食物添加剂等各种污染出现，在日常生活中，儿童性早熟的发病率明显增高（达0．6％），多出现在女孩，男女比例为1／23～1／3。本病对患儿的危害明显，青春期提前出现，最终身高低于按正常青春发育的同龄儿童。目前临床上一般通过病史、体检和骨龄、盆腔B超等辅助检查，内分泌检查作出初步诊断，其中黄体生成素释放激素（LHRH）刺激试验检查在真、假性早熟的鉴别诊断中有重要意义。血清瘦素（1eptin）、胰岛素样生长因子（insulin-1ike growth factor，IGF-1）、胰岛素样生长因子结合蛋白-3（IGF-binding protein 3，IGFBP3）水平的升高表示特发性中枢性性早熟（Idiopathic central precociouspuberty，ICPP）患儿下丘脑-垂体-性腺轴（hypothalamic pituitary gonadal，HPG轴）真性启动，因此，血清IGF-1、IGFBP3和leptin与儿童性早熟关系的研究对诊断具有重要意义。
